Report from Lieutenant B. Donegan, Office of the Director of Intelligence, to Colonel Michael Joseph Costello, Director of Intelligence, on the letter cipher in use in Northern Ireland,
1924 November 3.
This Item is under no known copyright.
| Main Creator: | |
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| Contributors: | |
| In collection: | Ernie O'Malley Papers, 1916-1949 |
| Format: | Manuscript |
| Language: | English |
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| Notes: | Typescript with autograph signature. Physical description: 1 item (1 page). more |
| Arrangement: | Item |
